(CNN) - When former Sen. Scott Brown of Massachusetts began to seriously think about launching a campaign for the Senate in neighboring New Hampshire, "one of the first calls he made to talk about running was to Gov. Mitt Romney," a close adviser to Brown tells CNN.

Wednesday, the two men talked again, as the former Massachusetts governor and 2012 GOP presidential nominee officially endorsed Brown, the frontrunner among the Republican candidates hoping to challenge Democratic Sen. Jeanne Shaheen of New Hampshire this November.

(CNN) - President Barack Obama tops the list of the worst presidents since World War Two, according to a new national poll.

And the survey, released Wednesday by Quinnipiac University, also indicates that a plurality of voters nationwide say in hindsight that the country would be better off if Mitt Romney had won the 2012 presidential election.

(CNN) - Mitt Romney's making another endorsement, and this time it's in a crucial Senate race in his own backyard.

CNN has learned that next week the 2012 GOP presidential nominee will endorse Scott Brown, the frontrunner among the Republican candidates hoping to challenge Democratic Sen. Jeanne Shaheen of New Hampshire this November.

With no clear frontrunner or obvious "next-in-line" candidate in the field of potential 2016 GOP presidential contenders, Mitt Romney keeps getting asked if he's thinking about throwing his hat in the ring one more time.

(CNN) – He's said over and over that he won't run for the White House a third time, but a new poll indicates that if Mitt Romney changed his mind and made another bid for president, he'd be the frontrunner among Republicans in the first-in-the-nation primary state of New Hampshire.

According to the Suffolk University/Boston Herald survey, which was released Thursday, 24% of Granite State Republicans and independents who lean towards the GOP say that Romney would be their first choice for their party's presidential nomination.

(CNN) – Mitt Romney said Sunday the way to pull down a potential Hillary Clinton campaign is to attack her record as secretary of state.

The 2012 Republican presidential candidate called Clinton’s tenure as American's top diplomat a "monumental bust" and narrowed in on Clinton's recent comments on the Taliban prisoner exchange for Sgt. Bowe Bergdahl.

(CNN) – Mitt Romney blasted President Barack Obama and former Secretary of State Hillary Clinton over foreign policy Thursday, saying their leadership during Obama’s first term helped weaken America’s standing in the world.

The 2012 GOP presidential nominee went after Clinton in particular for arguing that the five Taliban detainees released last month in exchange for captive Army Sgt. Bowe Bergdahl aren’t a threat to the United States.